January 31st (1917) was a Wednesday. It's the 30th day of the year (31st in leap years) in the Gregorian calendar. There are 335 days left to the end of the year.
Historical Events for 31st January, 1917
» World War I: Germany announces that its U-boats will U-boat Campaign (World War I) called resume unrestricted submarine warfare after a two-year hiatus.
Famous Birthdays on January 31 in 1917
» Fred Bassetti, American architect, founded Bassetti Architects (d. 2013)